isuspm.exe is a process that belongs InstallShield from Macrovision. The process automatically checks for the latest updates online. By removing this process you will not get informed about the latest updates for InstallShield.
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My system has been running very slow and it has taken me about two months to figure out that it was isuspm.exe that was probably slowing my system. I removed this from my computer and finally it is running smoothly.
I don't need this as I check manually for updates. This is totally not needed.
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